JP2014237083A - High speed rotation type disperser - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high speed rotation type disperser where: heat generation is suppressed as much as possible; a large shear rate is exhibited; a flow contributing to dispersion is regarded as important and the high performance dispersion of a raw material can be achieved; and namely, the size of dispersed particles can be reduced.SOLUTION: A high speed rotation type disperser comprises: rotation means located to be coaxial and capable of high speed rotation in a cylindrical vessel; and fixing means set together with the vessel at the inner surface of the vessel or on the inner surface of the vessel. The fixing means has an inner periphery facing the outer peripheral edges of a rotor with a fine clearance. A raw material slurry passes through the clearance while receiving a shear force. The peripheral velocity of rotors is set to be 25-100 m/s during rotation. The distance of the clearance is 0.5-1 mm.

Description

  The present invention relates to a high-speed rotating disperser, and more specifically, dispersion of magnetic materials, electrodes (spherical nickel, etc.), battery materials, food and cosmetic emulsification, inks and paints, dielectric materials, ceramics, and other general emulsifications. The present invention relates to a high-speed rotating disperser used in the above.

Examples of the emulsifier / disperser include a high pressure type and a rotary type.
The high-pressure type has the disadvantages that the booster pump is exhausted and can only be operated for a short period of time and is not suitable for slurry, and if there are coarse particles, it cannot be operated due to clogging at the ejection nozzle.
On the other hand, the rotary type has a type that disperses in the gap between the faces of the disk, but the gap changes greatly due to thermal expansion, so there is a limit on the gap, and since the shear rate cannot be made large, the dispersion capacity is lacking. Large shear rates can be obtained as such, but large machines are difficult due to accuracy problems.

  As the high-speed rotating disperser, a sealed wet disperser disclosed in JP-A-6-99047 is known. This sealed wet dispersion apparatus has a partition plate provided in a non-contact state with the rotating disk on the inner wall of the vessel in a wet dispersion apparatus having a plurality of disks rotating in the vessel, and The maximum gap between the disk and the partition plate is 1/10 or less of the radius of the disk.

In this closed type wet disperser, high-performance dispersion is expected with multiple shear force generation portions due to the gaps described above, but high-performance dispersion of the raw materials cannot be expected only by generating heat.
That is, the dispersion force is manifested by increasing the shear rate, but the sealed wet dispersion apparatus described in the above publication cannot increase the shear rate.

JP-A-6-99047

  Therefore, the present invention suppresses heat generation as much as possible, expresses a large shear rate, and attaches importance to the flow that contributes to dispersion, and can perform high-performance dispersion of raw materials, that is, reduce the particle size of dispersed particles. It aims at providing the high-speed rotation type disperser which can do.

The object is achieved by the high-speed rotating disperser of the present invention having the following configurations (1) to (11).
(1)
Cylindrical vessel, rotating means coaxially arranged in the vessel so as to be able to rotate at high speed, fixing means attached to the inner surface of the vessel or attached to the inner surface of the vessel, and one end of the vessel And a raw material supply port for introducing a raw material slurry into the vessel and a raw material exhaust for discharging the processed raw material slurry to the outside of the vessel. The rotation means includes a rotation drive shaft extending from one end of the vessel toward the other end, and a plurality of disk-shaped rotors arranged at intervals in the axial direction on the rotation drive shaft. Provided, the gap passes through the raw material slurry while receiving a shearing force, and the fixing means has an inner circumference facing each outer circumferential edge of the rotor with a fine gap, and the rotor is , Times In the peripheral speed is set to 25~100m / s, the distance of the gap, the high-speed rotation dispersing machine, which is a 0.5~1mm time.
(2)
The fixing means includes a plurality of annular and convex stators arranged so that the inner peripheral edge faces each outer peripheral edge of the rotor with a fine gap, and the concave portions between the stators are provided. The high-speed rotary disperser according to (1), wherein the high-speed disperser is a curved concave portion.
(3)
The high-speed rotational dispersion according to (1) or (2), wherein the fixing means is provided with a flow path guide plate for a raw material slurry in the middle of a plurality of stages composed of the rotor and the stator facing it. Machine.
(4)
The high-speed rotating disperser according to (3), wherein the flow path guide plate is an annular plate extending from the fixing means toward the rotation drive shaft.
(5)
The high-speed rotary disperser according to any one of (1) to (4), wherein the outer peripheral surface of the rotor is flat or has a structure provided with grooves along the circumferential direction.
(6)
The inner periphery of the fixing means or the inner peripheral surface of the stator facing the outer peripheral edge of the rotor is flat or has a structure provided with grooves along the circumferential direction. A high-speed rotating disperser as described in any of the above.
(7)
The high-speed rotational dispersion according to any one of (1) to (6), wherein the outer peripheral edge of the facing rotor and the inner peripheral edge of the stator have the same width, and the width is 5 mm to 20 mm. Machine.
(8)
The high-speed rotating disperser according to any one of (1) to (7), wherein 3 to 5 rotors are provided.
(9)
The high-speed rotation according to any one of (1), (2), and (5) to (8), wherein the flow path guide plate is not provided, and an interval between the rotors is 10 to 30 mm. Type disperser.
(10)
The high-speed rotating disperser according to any one of (1), (2), and (5) to (8), wherein an interval between the rotor and the flow path guide plate is 10 to 30 mm.
(11)
The width of the groove provided on the outer peripheral edge of the rotor is 2 to 10 mm, and the width on both sides of the groove on the outer peripheral edge of the rotor is 2 to 10 mm. High-speed rotating disperser as described in 1.

  Specifically, the width of the rotor and the stator facing it was suppressed as much as possible, the gap between the rotors was reduced, the stator was made convex and curved, and the rotor spacing was widened so as not to affect each. The distance from the partition plate provided in the middle between the rotors is also widened so as not to affect the rotor. In addition, grooves were cut into the rotor and stator to change the fluid and increase the dispersion force.

In the high-speed rotary disperser of the present invention, since it has the above-described structure, a large shearing performance is generated while minimizing friction between the rotor and the raw material slurry, and a large dispersion performance is exhibited while suppressing heat generation. it can.
Specifically, when the peripheral speed of the rotor 26 is set to 25 to 100 m / s and the gap interval is set to a range of 0.5 to 1 mm, a maximum shear rate of 200000 S ⁻¹ is obtained.

  In addition, the concave portions between the stators facing the rotor with minute gaps were curved concave portions, and the raw material was guided along the curves through the minute gaps, generating a contracted flow without any disturbance and promoting dispersion.

Furthermore, the rotor and the stator opposite thereto are minimized in the axial direction so that no extra load is generated. Also, the peripheral edges of the rotor and the stator are flat on both sides, with grooves only on the rotor, grooves on both the rotor and stator, and grooves only on the stator. I was encouraged.
Overall, finer dispersion is possible due to contraction, large shear rates, and fluid changes between the rotor and stator.

It is sectional drawing of the high-speed rotation type disperser of one embodiment of this invention. It is a figure which shows the example of a shape of the periphery of a rotor and a stator. It is sectional drawing of the high-speed rotation type disperser of other embodiment of this invention.

The high-speed rotating disperser of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 shows a high-speed rotating disperser 10 according to an embodiment of the present invention. The high-speed rotating disperser 10 is arranged in a cylindrical vessel 20 and coaxially arranged in the vessel 20 so as to be rotated at high speed. The rotating means 30 is provided on the inner surface of the vessel 20 and a fixing means 40 that is integrated with the vessel or attached to the inner surface of the vessel.

  The vessel 20 includes a cylindrical barrel 12, an end plate 14 fixed to one end of the barrel 12, and a frame 16 fixed to the other end of the barrel 12. The inside of the vessel 20 is a sealed dispersion chamber C1.

The rotating means 30 is arranged coaxially with the barrel 12 and thus with the vessel 20. The rotation means 30 is disposed on one end side of the vessel 20 and on the rotation drive shaft 24 extending from the outside of the vessel to the other end side into the dispersion chamber C1, and is spaced from the rotation drive shaft 24 in the axial direction. A plurality of annular plate-like rotors 26 are provided. It is preferable that 3 to 5 rotors 26 are provided, and the interval between these rotors 26 is preferably 10 to 30 mm. In operation, the rotor 26 is set to have a peripheral speed of 25 to 100 m / s.
In addition, in FIG. 1, the code | symbol 25 shows a shaft seal.

The fixing means 40 may simply be a portion of the barrel 12, but preferably has a structure as shown in FIG. That is, the fixing means 40 includes a plurality of annular and convex stators 42 arranged so that the inner peripheral edge faces each outer peripheral edge of the rotor 26 with a minute gap 28 therebetween. Is preferred.
The widths of the outer peripheral edge 26a of the rotor 26 and the inner peripheral edge 42a of the stator 42 facing each other are preferably the same, and the width is preferably 5 mm to 20 mm. The recesses 44 between the stators 42 are preferably curved recesses. This is because the stators 42 are connected by a gentle curve to create a flow of raw material slurry without any disturbance and guide it to the downstream gap 28. The number of rotors 26 and stators 42 is preferably 3 to 5, respectively.

  When there is the inner peripheral surface of the fixing means 40 and the stator 42, the distance of the gap between the inner peripheral surface of the stator 42 and the outer peripheral edge of the rotor 26 is set to 0.5 to 1 mm. Yes.

  The surface of the outer peripheral edge 26a of the rotor 26 is flat as shown in FIGS. 2 (a) and 2 (d), or grooves along the circumferential direction as shown in FIGS. 2 (b) and 2 (c). It is preferable that the structure is provided with 26b.

  The surface of the inner peripheral edge 42a of the stator 42 is flat as shown in FIGS. 2 (a) and 2 (b), or grooves along the circumferential direction as shown in FIGS. 2 (c) and 2 (d). A structure provided with 42b is preferable. That is, it is preferable that the combination of the structure of the outer peripheral edge and the inner peripheral edge of the rotor 26 and the stator 42 is any one of flat, groove flat, groove, and flat groove.

The grooves 26a and 42b are arranged at the center in the width direction of the outer peripheral surface and inner peripheral surface of the rotor 26 and stator 42, and their widths are preferably 2 mm to 10 mm, and their depths. The thickness is preferably 2 mm to 10 mm.
By providing grooves as described above at the periphery of the rotor 26 and the stator 42, the flow of the raw material slurry flowing through the gap was changed, thereby increasing the dispersion force.

  The vessel 20 is provided on one side of one end and the other end of the vessel 20, and is provided on the other side of the vessel at one end and the other end of the vessel. And a raw material discharge port 19a for discharging the gas to the outside of the vessel. In the illustrated embodiment, the raw material supply port 18a is provided on the frame 16 side and the raw material discharge port 19a is provided on the end plate 14 side. However, preferably, the raw material supply port is on the end plate 14 side. It is desirable to provide the material discharge port on the frame 16 side. That is, it is preferable to reverse the material supply port 18a and the material discharge port 19a. By introducing the raw material slurry from the center of the end of the vessel 20, the raw material slurry can be introduced into the vessel 20 with low resistance (by centrifugal force), and the treated raw material slurry is discharged from the outer periphery of the vessel 20. This facilitates the discharge by centrifugal force. A raw material supply passage 18 and a raw material discharge passage 19 are connected to the raw material supply port 18a and the raw material discharge port 19a, respectively.

FIG. 3 is a cross-sectional view of a high-speed rotating disperser 100 according to another embodiment of the present invention.
In the high-speed rotary disperser 100 according to this embodiment, a raw material slurry flow path guide plate 102 is provided in the fixing means 40 in the middle of a plurality of stages including the rotor 26 and the stator 42 opposed thereto. ing. The high-speed rotating disperser 100 according to this embodiment is different from that shown in FIG. 1 except that the flow path guide plate 102 is provided and the distance between the two rotors is increased by providing the flow path guide plate 102. Since the structure is the same as that of the high-speed rotating disperser 10 of the embodiment shown in FIG. 1, the same members / parts are denoted by the same reference numerals and the description thereof is omitted.

The distance between each of the rotors 26 and the flow path guide plate 102 is preferably 10 to 30 mm. Therefore, the distance between two adjacent rotors 26 is preferably about 20 to 60 mm.
The flow path guide plate 102 is preferably an annular plate extending from the fixing means 40 toward the rotation drive shaft 24.
By installing this flow path guide plate 102, the raw material slurry flows along the entire space between the rotors 26, and the stagnant region of the raw material slurry is eliminated.

In operation, the rotating means 30 is driven to rotate while introducing a raw material slurry, which is a slurry containing dispersed particles, from the raw material supply passage 18. The raw material slurry introduced into the crushing chamber C1 is agitated and moved to the raw material discharge passage 19 side while causing rotational movement in the crushing chamber C1. During this movement, the raw material slurry is caused to flow while being sheared between the gaps 28 formed in the rotor 26 and the stator 42 while being contracted. When the size of the gap 28 is set to 0.5 mm and the circumferential speed of the rotor 26 is set to 100 m / s, the shear rate at that time is 200000S- ¹ . This is repeated five times in the high-speed rotating disperser 10 of FIG. 1, and the raw material slurry is discharged to the outside of the disperser through the raw material discharge passage 19 with the dispersed particles sufficiently dispersed.

With the above configuration, the high-speed rotary disperser of the present invention can suppress heat generation as much as possible and efficiently and finely disperse the raw material particle agglomerates.
In addition, since the high-speed rotation type disperser of this invention is the above structures, it can be used also as an emulsifier with a favorable function.

DESCRIPTION OF SYMBOLS 10 High-speed rotation disperser 12 Barrel 14 End plate 16 Frame 18 Raw material supply passage 18a Raw material supply port 19 Raw material discharge passage 19a Raw material discharge port 20 Vessel 24 Rotation drive shaft 25 Shaft seal 26 Rotor 26a Rotor outer periphery 26b Groove 30 Rotating means 40 Fixing means 42 Stator 42a Stator inner peripheral edge 42b Groove 100 High-speed rotating disperser 102 Channel guide plate

Claims (11)

  Cylindrical vessel, rotating means coaxially arranged in the vessel so as to be able to rotate at high speed, fixing means attached to the inner surface of the vessel or attached to the inner surface of the vessel, and one end of the vessel And a raw material supply port for introducing a raw material slurry into the vessel and a raw material exhaust for discharging the processed raw material slurry to the outside of the vessel. The rotation means includes a rotation drive shaft extending from one end of the vessel toward the other end, and a plurality of disk-shaped rotors arranged at intervals in the axial direction on the rotation drive shaft. The fixing means includes an inner periphery facing each other with a fine gap at each outer peripheral edge of the rotor, and the gap passes through the raw material slurry while receiving a shearing force. , Times In the peripheral speed is set to 25~100m / s, the distance of the gap, the high-speed rotation dispersing machine, which is a 0.5~1mm time.   The fixing means includes a plurality of annular and convex stators arranged so that the inner peripheral edge faces each outer peripheral edge of the rotor with a fine gap, and the concave portions between the stators are provided. The high-speed rotating disperser according to claim 1, wherein the high-speed disperser is a curved concave portion.   3. The high-speed rotary disperser according to claim 1, wherein the fixing means is provided with a flow path guide plate for a raw material slurry in the middle of a plurality of stages including the rotor and the stator facing the rotor.   The high-speed rotary type disperser according to claim 3, wherein the flow path guide plate is an annular plate extending from the fixing means toward the rotary drive shaft.   The high-speed rotating disperser according to any one of claims 1 to 4, wherein the outer peripheral surface of the rotor is flat or has a structure provided with grooves along the circumferential direction.   The surface of the inner periphery of the said fixing means or the inner periphery of a stator facing the outer periphery of the said rotor is flat, or it is a structure where the groove | channel along the circumferential direction was provided. High-speed rotating disperser as described in 1.   The high-speed rotating disperser according to any one of claims 1 to 6, wherein a width of the outer peripheral edge of the rotor and the inner peripheral edge of the stator facing each other is the same, and the width is 5 mm to 20 mm.   The high-speed rotary disperser according to any one of claims 1 to 7, wherein 3 to 5 rotors are provided.   The high-speed rotating disperser according to any one of claims 1, 2, and 5 to 8, wherein the flow path guide plate is not provided, and an interval between the rotors is 10 to 30 mm.   9. The high-speed rotating disperser according to claim 1, wherein an interval between the rotor and the flow path guide plate is 10 to 30 mm. The width | variety of the groove | channel provided in the outer periphery of the said rotor is 2-10 mm, and the width | variety of the both sides of the groove | channel of the outer periphery of the said rotor is 2-10 mm. High-speed rotating disperser.

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